Backend Developer (Mid-to-Senior)

Job Description

Title: Backend Developer (Mid-to-Senior)

Company Name: Bijoy Online Limited

Vacancy: 02

Age: Na

Job Location: Dhaka (Banani)

Salary: Negotiable

Experience:

• 2 to 6 years
• The applicants should have experience in the following business area(s): IT Enabled Service

• Master of Science (MSc)

CSC

• 2 to 6 years
• The applicants should have experience in the following business area(s): IT Enabled Service

• Only Male

Required Experience (Updated)

• 3+ years of professional backend development experience.
• Proven track record integrating Payment Gateways (e.g. SSLCommerz, BKash, Nagad or similar local providers).
• Strong understanding of Billing Logic (managing invoices, ledgers, and recurring payment schedules).
• Proficiency in database management (PostgreSQL, MySQL, or MongoDB).
• Experience with API security standards (e.g., JWT, OAuth).
• Experience implementing automated unit and integration tests (e.g., Mocha, Jest for Node.js).
• Familiarity with containerization (Docker) and deployment to cloud environments (AWS, GCP, or Azure).
• Strong understanding of database optimization, indexing, and transaction management.

Key Responsibilities

• Design and implement secure and scalable APIs using Node.js (Express or NestJS).
• CRITICAL FOCUS: Integrate local and international Payment Gateways to handle recurring billing, invoicing, and complex payment reconciliation logic.
• Develop robust server logic for ISP subscriber management and automated billing cycles.
• Design and maintain database schemas (SQL or NoSQL) ensuring data integrity and performance.
• Implement security protocols and data protection measures for all transaction data.